U.S. patent application number 13/604618 was filed with the patent office on 2014-03-06 for generating native code from intermediate language code for an application.
This patent application is currently assigned to Microsoft Corporation. The applicant listed for this patent is Ashish Babbar, Casimir Lakshan Fernando, Abolade Gbadegesin, Subramanian Ramaswamy, Yasser Shaaban, Sameer Tejani, Adina M. Trufinescu, Mei-Chin Tsai. Invention is credited to Ashish Babbar, Casimir Lakshan Fernando, Abolade Gbadegesin, Subramanian Ramaswamy, Yasser Shaaban, Sameer Tejani, Adina M. Trufinescu, Mei-Chin Tsai.
Application Number | 20140068583 13/604618 |
Document ID | / |
Family ID | 49226515 |
Filed Date | 2014-03-06 |
United States Patent
Application |
20140068583 |
Kind Code |
A1 |
Tejani; Sameer ; et
al. |
March 6, 2014 |
GENERATING NATIVE CODE FROM INTERMEDIATE LANGUAGE CODE FOR AN
APPLICATION
Abstract
Disclosed herein are representative embodiments of tools and
techniques for installing, executing, and/or updating managed
applications through generation of native code from code in an
intermediate language. According to one exemplary technique, a
computing device receives machine dependent intermediate language
code (MDIL code) generated by an online provider for an
application. Additionally, the computing device installs the
application on the computing device by generating a native image
for the application, which includes binding a portion of the MDIL
code with one or more libraries on the computing device. Also, the
native image is stored on the computing device for use in loading
the application for execution.
Inventors: |
Tejani; Sameer; (Newcastle,
WA) ; Trufinescu; Adina M.; (Redmond, WA) ;
Shaaban; Yasser; (Seattle, WA) ; Gbadegesin;
Abolade; (Seattle, WA) ; Babbar; Ashish;
(Bothell, WA) ; Tsai; Mei-Chin; (Bellevue, WA)
; Ramaswamy; Subramanian; (Redmond, WA) ;
Fernando; Casimir Lakshan; (Renton, WA) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Tejani; Sameer
Trufinescu; Adina M.
Shaaban; Yasser
Gbadegesin; Abolade
Babbar; Ashish
Tsai; Mei-Chin
Ramaswamy; Subramanian
Fernando; Casimir Lakshan |
Newcastle
Redmond
Seattle
Seattle
Bothell
Bellevue
Redmond
Renton |
WA
WA
WA
WA
WA
WA
WA
WA |
US
US
US
US
US
US
US
US |
|
|
Assignee: |
Microsoft Corporation
Redmond
WA
|
Family ID: |
49226515 |
Appl. No.: |
13/604618 |
Filed: |
September 5, 2012 |
Current U.S.
Class: |
717/163 |
Current CPC
Class: |
G06F 8/54 20130101; G06F
8/41 20130101; G06F 8/61 20130101; G06F 8/447 20130101; G06F 8/51
20130101; G06F 8/63 20130101; G06F 8/40 20130101; G06F 8/65
20130101 |
Class at
Publication: |
717/163 |
International
Class: |
G06F 9/44 20060101
G06F009/44 |
Claims
1. A method comprising: receiving, at a computing device, machine
dependent intermediate language code (MDIL code) generated by an
online provider for an application; at the computing device,
installing the application on the computing device by generating a
native image for the application by binding the MDIL code, the
generating the native image comprising: binding a portion of the
MDIL code with one or more libraries on the computing device; and
storing the native image on the computing device for use when
loading the application for execution.
2. The method of claim 1 further comprising updating the computing
device, the updating the computing device comprising: updating a
set of libraries on the computing device, the set of libraries
including at least one library of the one or more libraries bound
to the portion of the MDIL code; updating at least one runtime
engine of the computing device; after the updating of the set of
libraries, automatically generating an updated native image for the
application by binding the portion of the MDIL code with the at
least one library of the one or more libraries after the one or
more libraries are updated on the computing device, the updated
native image for the application generated such that the updated
native image is runnable using the updated at least one runtime
engine; and storing the updated native image on the computing
device for use when loading the application for execution.
3. The method of claim 2, wherein the application is a first
application and the computing device includes a native image for a
second application installed on the computing device, and wherein
the method further comprises: responsive to the updating of the set
of libraries, automatically generating an updated native image for
the second application using one or more files included received in
an installation package for the second application before the
application was installed on the computing device.
4. The method of claim 2 further comprising: temporarily preserving
the native image of the application during the updating of the
computing device; determining that the updating of the computing
device failed; and restoring the native image of the application
for use when loading the application.
5. The method of claim 1, wherein the MDIL code is generated by the
online provided by compiling preliminary code, and wherein the
preliminary code comprises source code or code of the application
in an intermediate language that does not include code in a machine
dependent intermediate language.
6. The method of claim 1, wherein: the MDIL code is received in an
installation package for the application; the MDIL code is included
in a set of files; and the portion of the MDIL code is included in
at least one file of the set of files.
7. The method of claim 6 further comprising, determining that the
at least one file of the set of files is signed by the online
provider to indicate the at least one file is trusted as having
been generated by the online provider.
8. The method of claim 6, wherein the installation package further
includes a binding list that identifies the respective files of the
set of files that include the MDIL code, and the method further
comprises: with a package manager, evaluating the binding list, the
binding list associating the at least one file of the set of files
with a list of the one or more libraries; invoking a binder to
perform the binding; and based on the evaluation of the binding
list, providing the binding list of the one or more libraries to
the binder to identify the one or more libraries for binding to the
at least one file of the set of files.
9. The method of claim 1, further comprising loading the native
image during execution of the application, wherein the loading of
the native image is performed by a common language runtime.
10. The method of claim 1, wherein the MDIL code comprises one or
more machine code instructions and one or more pseudo instructions
encoded at a binary level, and wherein the machine code
instructions are based on a processor instruction set for a
processor of the computing device.
11. The method of claim 10, wherein the binding the MDIL code with
the one or more libraries comprises: generating executable code at
least by generating a native language instruction from a pseudo
instruction of the pseudo instructions in the MDIL code.
12. The method of claim 11 wherein the generating a native language
instruction comprises generating a numeric field offset based on
the pseudo instruction.
13. The method of claim 12, wherein the pseudo instruction includes
a token that identifies a field and the native instruction includes
the numeric field offset to reference the field when executed.
14. The method of claim 10, further comprising: receiving new MDIL
code for the application; updating the application on the computing
device by generating an updated native image for the application,
including binding a new portion of the MDIL code with the one or
more libraries on the computing device; and storing the updated
native image on the computing device for use when loading the
application for execution.
15. A computing device that includes a processor and memory, the
memory storing computer-executable instructions for causing the
computing device to perform a method, the method comprising:
receiving, at the computing device, at least one installation
package for an application from an online provider, the at least
one installation package comprising a set of machine dependent
intermediate language files (MDIL files); providing, to a binder of
the computing device, at least one MDIL file of the set of MDIL
files and one or more libraries to be bound to the at least one
MDIL file; and with the binder, generating a native image for the
application, the generating comprising binding machine dependent
intermediate language code (MDIL code) of the at least one MDIL
file using the one or more libraries.
16. The computing device of claim 15, wherein the set of MDIL files
are generated by the online provider at least by compiling
preliminary code of the application to generate the set of MDIL
files, before the at least one installation package is received at
the computing device.
17. The computing device of claim 15, wherein the respective files
of the set of MDIL files are signed at an online marketplace to
indicate the respective files have been generated at the online
marketplace before the at least one installation package is
received.
18. A method comprising: generating a set of machine dependent
intermediate language files (MDIL files) for an application by
compiling preliminary code of the application into machine
dependent intermediate language code (MDIL code); signing
respective files of the set of MDIL files to indicate the
respective files are trusted as being from an online marketplace;
generating a binding list that identifies the respective files of
the set of MDIL files; generating an installation package for the
application comprising the set of MDIL files for the application
and the binding list; and providing, at the online marketplace, the
installation package for downloading.
19. The method of claim 18 further comprising: receiving, at a
computing device, the installation package from the online
marketplace; generating a native image for the application by
binding the MDIL code included in the set of MDIL files with one or
more libraries of the computing device; marking the application as
being trusted to execute on the computing device; and storing the
native image on the computing device for use when loading the
application for execution.
20. The method of claim 19 further comprising: updating at least
one library of the one or more libraries of the computing device;
updating at least one runtime engine of the computing device; and
responsive to the updating of the at least one of the one or more
libraries, generating an updated native image for the application
by binding the MDIL code included in the set of MDIL files with the
updated at least one library of the computing device such that the
updated native image is runnable using the updated at least one
runtime engine.
Description
BACKGROUND
[0001] Various mobile devices also support applications that can be
downloaded in a representation that cannot be executed directly but
can be executed when compiled on a mobile device using just-in-time
compilation (JIT compilation). Although JIT compilation of code has
been used to run applications on a computer, running applications
using JIT compilation has limitations, including additional time
needed for compilation when the application runs, and potentially
non-optimal decisions made during compilation.
SUMMARY
[0002] Among other innovations described herein, this disclosure
presents various representative embodiments of tools and techniques
for installing, executing, and/or updating managed applications
through generation of native code from code in an intermediate
language. According to one exemplary technique, a computing device
receives machine dependent intermediate language code (MDIL code)
generated by an online provider for an application. The computing
device installs the application on the computing device by
generating a native image for the application, including by binding
a portion of the MDIL code with one or more libraries on the
computing device. Also, the native image is stored on the computing
device for use when loading the application for execution.
[0003] According to an exemplary tool, a computing device receives,
from an online provider, an installation package for an
application, where the installation package includes a set of
machine dependent intermediate language files (MDIL files).
Additionally, a binder of the computing device is provided at least
one file of the set of MDIL files and one or more libraries to be
bound to the at least one file. The binder generates a native image
for the application by binding MDIL code of the at least one MDIL
file using the one or more libraries.
[0004] In another exemplary technique, an online provider generates
MDIL code from preliminary code for an application. A computer
system generates a set of MDIL files for the application by
compiling preliminary code of the application into MDIL code, then
signs respective files of the set of MDIL files to indicate the
respective files are trusted as being from an online marketplace.
The computer system generates a binding list that identifies the
respective files of the set of MDIL files, and also generates an
installation package for the application comprising the set of MDIL
files for the application and the binding list. The computer system
then provides, at the online marketplace, the installation package
for downloading.
[0005] When it receives the installation package, a computing
device receives the MDIL code and generates a native image for the
application to install the application on the computing device.
Additionally, a runtime engine of the computing device and/or one
or more libraries used by the installed application can be updated
on the computing device during an update to the computing device,
and the application is automatically updated in response. The
application is updated by generating an updated native image for
the application using the one or more libraries that were updated.
The updated native image is generated such that it is runnable
using the updated runtime engine on the computing device. After the
updated native image is generated, the application is run by
loading the updated native image instead of the previously
generated native image.
[0006] This summary is provided to introduce a selection of
concepts in a simplified form that are further described below.
This summary is not intended to identify key features or essential
features of the claimed subject matter, nor is it intended to be
used to limit the scope of the claimed subject matter. The
foregoing and other objects, features, and advantages of the
technologies will become more apparent from the following detailed
description, which proceeds with reference to the accompanying
figures.
BRIEF DESCRIPTION OF THE DRAWINGS
[0007] FIG. 1 is a diagram illustrating an exemplary online
provider/marketplace and exemplary computing device that loads a
native image of an application installed by binding machine
dependent intermediate language code (MDIL code).
[0008] FIG. 2 is a flow diagram of an exemplary method of binding
MDIL code of an application to install the application on a
computing device.
[0009] FIG. 3 is diagram illustrating an exemplary online
provider/marketplace and exemplary computing device that can
install one or more managed applications by generating one or more
native images from code in an intermediate language that is
provided and generated by the online provider/marketplace (or other
online providers/marketplaces).
[0010] FIG. 4 is a flow diagram of an exemplary method for
installing and updating an application through native code
generation using code in a MDIL.
[0011] FIG. 5 is a flow diagram of an exemplary method of
generating an installation package for an application, where the
installation package can be provided for download.
[0012] FIG. 6 is a diagram of a computing device that can generate
one or more updated native images for one or more installed
applications.
[0013] FIG. 7 is a flow diagram of an exemplary method for updating
an application by generating a native image for the application
from code in a MDIL.
[0014] FIG. 8 is a schematic diagram depicting an exemplary mobile
device with which at least some of the disclosed embodiments can be
implemented.
[0015] FIG. 9 is a schematic diagram illustrating a generalized
example of a suitable implementation environment for at least some
of the disclosed embodiments.
[0016] FIG. 10 is a schematic diagram illustrating a generalized
example of a suitable computing environment for at least some of
the disclosed embodiments.
DETAILED DESCRIPTION
[0017] This disclosure presents various representative embodiments
of tools and techniques for installing, executing, and/or updating
managed applications through generation of native code from code in
an intermediate language. For example, a computing device receives
MDIL code generated by an online provider for an application. The
computing device installs the application by generating a native
image for the application. As part of the generation of the native
image, the computing device binds a portion of the MDIL code with
one or more libraries on the computing device. The computing device
stores the native image for use when loading the application for
execution. In this way, performance of the application can benefit
from previous offline compilation of at least part of the
application (to produce MDIL code appropriate for the device). At
the same time, this approach can facilitate updating of the
application when there is a change to a library used by the
application and/or MDIL code for the application.
[0018] The various features of the techniques and tools described
herein can be used in combination or separately, depending on
implementation. Different features of the techniques and tools
described herein affect different stages of processing, including
ingestion, installation, execution, application update and device
update. The term ingestion generally refers to the process in which
a developer uploads an application to an online provider, which
processes the application for efficient execution on one or more
types of computing devices, validates the application, and makes
the application available for download. The term installation
generally refers to the process of adapting the application to run
on a specific computing device, which converts the application to a
form more suitable for prompt and secure execution on the device
(e.g., converting MDIL code to native instructions during binding
by resolving references to libraries and other resources, storing a
native image that can be loaded for execution, marking the
application as trusted, etc.). During execution, the trusted native
image for the application can be quickly loaded and run. The term
application update generally refers to the process in which an
application is updated (e.g., MDIL code for the application), which
can involve re-installation of the application on the device. The
term computing device update generally refers to the process that
follows after a runtime engine, a library or other resource
referenced by an application has been updated, which typically
involves re-binding applications that depend on the library or
other resource that has changed.
Exemplary System for Installing and Loading an Application by
Generating Native Code from Code in a MDIL
[0019] FIG. 1 is a diagram illustrating an exemplary online
provider/marketplace and exemplary computing device 100 that loads
a native image 110 of an application installed by binding MDIL code
120. In FIG. 1, preliminary code 130 for the application is
received by an online provider 140. For example, the preliminary
code 130 can be code for the application that is source code or
code in an intermediate language such as Microsoft Intermediate
Language (MSIL). At 135, the preliminary code is provided to a
compiler 150 that compiles the preliminary code 130 into the MDIL
code 120 for the application. The preliminary code 130 can be a
higher level representation of the code for the application than
the MDIL code 120. For example, the preliminary code 130 is in an
intermediate language (IL) that is at a higher level than the MDIL
code 120, which is at a level closer to machine code. The MDIL code
120 can be machine dependent such that it includes native code that
is based on a processor instruction set. The processor instruction
set can be an instruction set for an ARM processor, an x86
processor, or other processor. The MDIL code 120 can also include
unresolved pseudo instructions with symbolic references which can
be resolved to generate native code through binding.
[0020] The MDIL code 120 for the application is received at the
computing device 100. As part of the installation of the
application, the MDIL code 120 is provided to a binder 160 that
binds the MDIL code 120 to one or more libraries 170 on the device.
The one or more libraries 170 can be code libraries and/or
framework libraries for classes, types, or the like. By binding the
MDIL code 120 on the computing device 100, the binder 160 generates
the native image 110 of the application. The native image 110
includes native code for the application and is stored at the
device. At 180, the native image is loaded to execute the
application.
Exemplary Method for Binding MDIL Code to Install an Application on
a Computing Device
[0021] FIG. 2 is a flow diagram of an exemplary method 200 of
binding MDIL code of an application to install the application on a
computing device. In various implementations, the illustrated
method blocks of FIG. 2 may be merged, divided into sub-blocks, or
omitted.
[0022] In FIG. 2, a computing device receives MDIL code for the
application from an online provider at 210. For example, the
computing device can receive one or more files which include code
for the application, where the code is in an IL that is machine
dependent such as code in Machine Dependent Intermediate Language
as described in U.S. Patent Application Publication No.: US
2011/0258615 or in another machine dependent intermediate language.
Since the MDIL code is received at the computing device from the
online provider, the MDIL code can be generated from compilation by
the online provider or elsewhere in the cloud. For example, the
online provider compiles preliminary code for the application to
generate the MDIL code for the application.
[0023] In some implementations, an installation package for the
application is received and the installation package includes the
MDIL code for the application. The installation package for an
application can include other information for the application such
as resource files for the application. The MDIL code for an
application can be stored on the computing device for installation
of the application and for subsequent updating of the
application.
[0024] At 220, the application is installed on the computing device
by generating a native image of the application, which includes
binding the MDIL code of the application. For example, a binder can
bind the MDIL code to one or more libraries available on the
computing device to generate a native image for the application
that is executable. The application can be a managed application
executed using a runtime or execution engine such as the Common
Language Runtime of the .NET framework, or other runtime engine. A
runtime engine and/or execution engine can be a software layer on
which the application ultimately runs. In some implementations, a
managed application is an application that executes using a
framework that includes one or more shared libraries and one or
more managed code runtime environments. For example, libraries are
base class libraries that are shared among applications. In some
implementations, a library on a computing device can be an image of
the library that is in native and/or machine code, which can be
loaded into memory for use by a managed application that is also
loaded into memory. In some implementations, the generated native
image can be generated by a binder such that the native image is
runnable by a runtime or execution engine that is used to run the
application on the computing device. For example, the binder can
use and/or reference the runtime engine for the application during
binding so that the binding is appropriate for execution using the
runtime engine.
[0025] In some implementations, the binding, of the binder,
resolves the MDIL code and generates native code for the
application that is included in the native image for the
application. The native code can be machine code that is executable
on a particular processor and that uses instructions from a
processor instruction set. The processor instruction set can be an
instruction set for an ARM processor, an x86 processor, or other
processor. In some implementations, in generating the native image,
for each MDIL file in the set of files received for the
application, the respective MDIL file and the one or more libraries
that are to be bound to the MDIL code of the file are provided to
the binder. For example, one or more file paths to MDIL files
and/or library files can be provided to the binder. The binder
binds the respective MDIL files to the libraries provided to the
binder to generate the native image for the application. The native
image can include native code such as machine code that is
executable by the processor of the computing device. (In addition
to the native image, at least some code for the application can be
kept in an IL form, for just-in-time compilation or other
compilation before the application is launched or when the
application is launched. This may be useful when resources
frequently changes, or when a type value or other reference cannot
be resolved when the application is installed and remaining MDIL
code is bound to libraries on the device.)
[0026] In some implementations, the application can be installed on
the device by a package manager. For example, during installation
of the application, a received installation package for the
application can be unpacked by a package manager. If the
installation package and/or one or more of the files included in
the installation package are compressed, then the package manager
can decompress such files. If one or more files are not compressed
then the package manager does not decompress such files. The
package manager can provide each of the MDIL files that are to be
bound to the binder along with the libraries that are to be bound
to the respective MDIL files. In some implementations, the package
manager provides the MDIL files and/or the one or more libraries by
providing references to the MDIL files and/or the one or more
libraries to the binder. The binder binds the respective MDIL files
to the provided libraries for the respective MDIL files to generate
the native image of the application. The native image can be
generated by the binder such that the native image is runnable
using the runtime engine available on the computing device for
running the application.
[0027] At 230, the native image of the application is stored on the
computing device for use when loading the application for
execution. For example, the native image generated is loaded to
execute the application (and the MDIL code that is not executable
is not used to execute the application). In some implementations,
the native image is determined as being trusted before being loaded
for execution. In other implementations, the computing device does
not make any determination about whether the native image is
trusted before the native image is loaded for execution.
Exemplary System for Generating Native Code from Provided MDIL Code
for Application Installation and Execution
[0028] FIG. 3 is diagram illustrating an exemplary online
provider/marketplace and exemplary computing device 350 that can
install one or more managed applications by generating one or more
native images from code in an intermediate language such as a MDIL
that is provided and generated by the online provider (or other
online providers). In FIG. 3, an online provider 305 uses a
compiler 310 to compile preliminary code 315 into one or more MDIL
files 320, which are files that include code in a MDIL. The set of
the one or more MDIL files 320 are packaged into an installation
package 325 for the application. Each of the MDIL files can be
signed as being trusted, as shown at 330. One or more files 335
that include support information such as resource files or
application content can be included in the installation package
325. The installation package 325 is stored by the online provider
305 and is offered for downloading, as shown at 340. Before the
installation package 325 is downloaded from the online provider
305, the installation package 325 itself can be signed as trusted,
as shown at 345.
[0029] Thus, the installation package 325 is offered as part of a
catalog of applications in an online marketplace. Different
versions of the installation package 325 can be offered for
different types of computing devices. For example, different types
of MDIL code (adapted for different types of processors) are
included in different installation packages for the different types
of computing devices. The installation packages available for
different types of computing devices can also include a version
with non-MDIL code (e.g., MSIL code in a XAP file) for purposes of
backward compatibility.
[0030] The computing device 350 downloads one or more installation
packages, including the installation package 325, from the online
provider at 355. As part of installing the application, the package
manager 360 of the computing device 350 unpacks the one or more
MDIL files 320 and the one or more files 335 that include support
information for the application. The package manager also invokes a
binder 365. For each MDIL file of the set of the one or more MDIL
files 320, the package manager 360 provides the respective MDIL
file such as MDIL file 322 to the binder 365 along with the one or
more libraries to be bound with the respective MDIL file, such as
the one or more libraries 370. The binder 365 binds the respective
MDIL file to the one or more libraries provided for the respective
MDIL file to generate native code. The libraries provided for the
MDIL files (such as the one or more libraries 370) are included in
the set of libraries 375 that are on the computing device 350.
Using the native code generated from binding the one or more MDIL
files 320, the binder generates a native image 380 for the
application. The native image 380 can be generated by the binder
365 such that the native image 380 is runnable using a runtime
engine on the computing device that can run the application. The
native image 380 is stored as part of installing the application on
the device, as shown at 385. The computing device 350 can also
install one or more other applications and store generated native
images corresponding to the respective other applications.
[0031] As shown at 390, the native image 380 can be signed as
trusted code that was generated from trusted code by the binder
365. The native image 380 can be signed before it is stored and/or
loaded for use in executing the application. At 395, the native
image 380 is loaded to execute the application. When loaded, the
native code of the native image is executed by the computing device
305 to provide the functionality of the application.
Exemplary Method for Installing and Updating an Application through
Native Code Generation Using Code in a MDIL
[0032] FIG. 4 is a flow diagram of an exemplary method 400 for
installing and updating an application through native code
generation using code in a MDIL. In FIG. 4, as shown at 410, an
installation package is generated that includes MDIL code. In some
implementations, the MDIL code can be included in one or more
files. In some implementations, preliminary code can be compiled to
generate the MDIL code.
[0033] In some implementations, the MDIL code for the application
includes native code based on a processor instruction set, but can
also include pseudo instructions. For example, a pseudo instruction
includes a symbolic reference and/or field key that cannot be
resolved when the MDIL is generated. Thus, in some implementations,
pseudo instructions can include symbolic references to fields,
types, or the like. For example, the symbolic references can be
tokens that identify a field or a type to be used without
specifically indicating a field's offset or a type's size. In some
implementations, a symbolic reference can be a token that can be
interpreted by a binder to determine native code to be generated
for the symbolic reference. For example, for a token such as a
field token that references a field of an object, a binder on a
particular computing device can (1) lay out the object as it is
available on the computing device through a library and (2)
determine the appropriate offset for the field of the object, when
generating executable instructions for the computing device. Thus,
in some implementations, field offsets for objects in MDIL code can
be symbolic instead of hard coded as a numeric offset (such as in a
corresponding native code).
[0034] The pseudo instruction can abstract implementation details
which are to be determined and/or resolved when the pseudo
instruction is bound to an appropriate library on a computing
device. In some implementations, MDIL code includes pseudo
instructions that include symbolic references that can be converted
by a binder to produce native instructions that are executable by a
processor. For example, MDIL code can include pseudo instructions
that can be converted by a binder into machine instructions for
accessing a field of an object which is managed by a runtime engine
such as the Common Language Runtime (CLR) of the .NET framework or
the like. In some implementations, pseudo instructions in the MDIL
code can be similar to machine code in a native language such that
registers are already allocated but offsets have not been included
for one or more libraries and/or classes. For example, the field
offset included in a native instruction as converted from the
pseudo instruction can be determined by a binder and can depend on
a version of a library available and/or on a computing device. In
some implementations, MDIL code can include pseudo instructions
that can be converted by a binder into machine instructions for
looking up an instantiation or instance of a generic type or
method.
[0035] With reference to FIG. 4, at 420, a computing device
receives the MDIL code for an application. For example, the
computing device can receive an installation package for the
application that includes MDIL files that include the MDIL code for
the application. In some implementations, the installation package
can include a binding list that includes a listing of the MDIL
files of the application that are to be bound to generate a native
image for the application and listing of the set of one or more
libraries that are to be bound to the respective MDIL files. In
some implementations, one or more of the libraries to be bound to
the MDIL code of an application are libraries that are declared
and/or included in the source code of the application. One or more
other libraries to be bound to the MDIL code of an application can
be libraries that are not declared and/or included in the source
code of the application.
[0036] At 430, the application is installed on the computing device
by generating a native image for the application. In some
implementations, the application can be installed by a package
manager. For example, the package manager can determine that the
installation package is signed as trusted before using its files to
install the application on the computing device, and if the
installation package is not signed as trusted, the package manager
does not use the installation package to install the application on
the computing device. The package manager can provide each of the
MDIL files that are to be bound to the binder along with the
libraries that are to be bound to the respective MDIL files. In
some implementations, instead of or in addition to determining
whether the entire installation package is signed as trusted, the
MDIL files can be determined to be signed as trusted before being
used to generate a native image for the application, and MDIL files
that are determined not to be signed as trusted are not used to
generate a native image for the application. In some
implementations, the package manager can be provided and use a
binding list to automatically determine and identify the MDIL files
that are to be bound and the respective libraries that are to be
bound the code of the respective MDIL files for the application.
The binding list can be in a machine readable format such as in a
programming, scripting, or markup language. For example, the
binding list can be included in a file that includes information
organized using the Extensible Markup Language (XML).
[0037] In some implementations, the package manager provides the
MDIL files and/or the one or more libraries to the binder by
providing references to the MDIL files and/or the one or more
libraries to the binder. The binder binds the respective MDIL files
to the provided libraries for the respective MDIL files to generate
the native image of the application. At a high level, the binder
reads in MDIL instructions, converts IL instructions to native
instructions, and passes through instructions that are already in
native form. For example, a binder can bind the MDIL code to one or
more libraries on the computing device to generate a native image
for the application that is executable. The native image can be
generated by the binder such that the native image is runnable
using the runtime engine on the computing device, that is available
to the binder, that is for running the application. The runtime
engine can be a software layer that can ultimately run the
application on the computing device. In some implementations, the
binder can be run using information from a script, user input
and/or other information. In some implementations of binding code,
the MDIL code is provided to the binder. The binder resolves the
pseudo instructions to generate corresponding native instructions.
For example, from symbolic references (e.g., field token) in pseudo
instructions, the binder can generate native code by determining
and specifying numeric offsets for fields based on a type layout.
In some implementations, the MDIL pseudo instructions can be used
to create native instructions which can differ in length from the
pseudo instructions. Alternatively, the native instructions may not
differ in length from the pseudo instructions. In some
implementations, at least some of the MDIL code for an application
can be close to the machine code included in a native image of the
application; however, other parts of the MDIL code can provide a
level of abstraction that allows a portion of the MDIL code to be
bound to a library that can be available in one or more versions.
Through binding, the MDIL code can be used to generate executable
code that executes using a particular version of the library. For
example, binding MDIL code to a first set of libraries can generate
executable code for the application. Or, binding the MDIL code to
the set libraries with one or more of the libraries being of a
different version can also generate executable code for the
application. The sets of versions of the one or more libraries can
have overlapping versions of libraries.
[0038] In some implementations, binding MDIL code generates code
that can be directly executed by a processor without further
compilation. For example, binding MDIL code to a library includes
generating a native instruction from an instruction in the MDIL
code. In some implementations, MDIL code includes pseudo
instructions that include symbolic references that are converted
and/or bound by a binder to produce native instructions that are
executable by a processor. For example, a binder can convert pseudo
instructions into native code instructions for accessing a field of
an object which can be managed by a runtime engine on the computing
device. In some implementations, parts of the MDIL code can be
similar to the generated native code such that registers are
allocated, but in the MDIL code offsets have not been included for
one or more libraries and/or classes. In some implementations, a
binder can convert pseudo instructions into native code
instructions for looking up an instantiation or instance of a
generic type or method.
[0039] In some implementations, MDIL code symbolic instructions and
the generated corresponding native instructions are consistent with
regard to virtual method slot assignment and/or object field
layout. For example, the MDIL code and the executable native code
can be consistent with regard to object field layout, such that a
portion of MDIL code for accessing objects that includes a field
token can be used to generate native instructions (e.g., machine
instructions) using numeric field offsets. In some implementations,
the binder can generate a numeric offset from a symbolic reference
to generate one or more executable machine instructions. For
example, a symbolic reference in the MDIL code is converted by a
binder into a specific field reference such that the specific field
reference includes a numeric size and/or offset.
[0040] In some implementations of binding MDIL code, a binder can
interpret a symbolic reference that includes a token to determine
native code to be generated for the symbolic reference. For
example, for a field token that references a field of an object,
the binder can lay out the object as it can be available on the
computing device and determine the appropriate offset for the field
of the object for generating executable instructions for the
computing device. In some implementations of binding MDIL code, a
binder that can bind MDIL code is more complicated than a linker.
For example, in binding MDIL code, the binder can adjust one or
more jumps in resulting native code so that the jumps are to their
intended targets.
[0041] In addition to native code in the native image, at least
some code for the application can be kept in an IL form. The code
in IL form is further processed during just-in-time compilation or
other compilation before the application is launched or when the
application is launched. This may be useful when a runtime engine,
a library, or other resource frequently changes. Or, it may be
useful when a type value or reference cannot be resolved during the
binding process in which remaining MDIL code is bound to libraries
on the computing device.
[0042] At 440, the native image is stored for use when loading the
application for execution. For example, when a user launches the
application on the computing device, the native image of the
application is loaded by an execution engine or runtime such as the
CLR of the .NET framework or other runtime engine. In some
implementations, the computing device can include MSIL code for the
application that can be compiled on the computing device using
just-in-time compiling to execute the application, but instead of
executing the application using the MSIL code, the native image for
the application is loaded and executed to run the application. In
some implementations, when the native image is loaded, one or more
library images or assemblies are loaded that are used by the code
of the application as included in the native image. For example,
the native image can be loaded for execution using a runtime engine
of the computing device. The native image for the application can
be signed by the binder before it is stored, to show that the
application is trusted.
[0043] At 450, the computing device is updated at least by updating
a set of libraries on the computing device. For example, one or
more of the libraries in the set of libraries of the computing
device can be updated, replaced, or changed. This can disrupt the
operation of applications that were bound to a previous version of
the set of libraries. Thus, after the one or more libraries are
updated, replaced, or changed, one or more of the applications on
the computing device can be updated such that an updated native
image for the respective applications can be generated. An updated
native image for an application can be generated by binding MDIL
code for the application (which is stored in MDIL form on the
computing device even after installation) to at least one of the
set of one or more libraries that were updated. The rebinding of
the MDIL code for the application to one or more of the libraries
on the computing device after libraries are updated can allow the
native images to properly reference the one or more libraries as
available on the computing device after updating the device and/or
updating libraries of the device. At the same time, complete
re-compilation of code for an application is not needed every time
a library changes, since the MDIL code for the application can be
reused. When the changed library is used by many of the
applications on a device, re-binding using previously stored MDIL
code for the respective applications can greatly simplify the
process of updating native images for the respective
applications.
[0044] For example, suppose seven applications each have a
dependency on a library that has been changed. For each of the
seven applications, offline compilation in the cloud (e.g., by an
online provider) can produce efficient MDIL code for that
application, using compilation that is more sophisticated and/or
time-consuming that just-in-time compilation or compilation on a
device for purposes of updating. Rather than re-compile each of the
seven applications when the library changes, which would be
time-consuming and might lead to a less efficient native image, the
respective applications are re-bound to libraries on the computing
device, which is much faster since the "heavy lifting" on
compilation optimization was previously done in the cloud.
[0045] In some implementations, the computing device is updated
such that the updating includes updating a runtime engine of the
computing device. For example, the runtime engine, of the computing
device, that runs one or more installed applications using native
images for the applications can be updated, replaced, or changed.
The runtime engine can be the software layer that ultimately runs
an updated application so when the runtime engine is changed an
updated native image for an updated application can be generated by
a binder to be executable using the updated runtime engine as
available to the binder and on the computing device. In some
implementations, both a runtime engine and libraries of the
computing device are changed upon a device update and an
application can be updated so that it can be executed and/or run
properly with the updated runtime engine and updated libraries.
Exemplary Method for Generating an Installation Package for an
Application that can be Provided for Download
[0046] FIG. 5 is an exemplary method 500 of generating an
installation package for an application that can be provided for
download. In various implementations, the illustrated method blocks
of FIG. 5 may be merged, divided into sub-blocks, or omitted. In
FIG. 5, preliminary code for an application is received. For
example, a developer of an application can send code for the
application in a preliminary language and/or state, and the
preliminary code for the application can be received by an online
provider such as an online marketplace. In some implementations,
the preliminary code for the application is source code for the
application. For example, source code can be code written in one or
more programming languages such as C++, C#, Visual Basic.RTM., J#,
J++, or other like programming languages. In some implementations,
the preliminary code for the application is in an intermediate
representation such as in an IL. For example, source code for the
application can be compiled by a compiler and/or a generator into
an intermediate representation in an IL. In some implementations,
the IL can be in Microsoft Intermediate Language (MSIL). In some
implementations, the IL does not include native instructions that
are machine dependent. The code in IL can be compiled, however,
into code in a MDIL that includes native instructions that are
machine dependent.
[0047] In some implementations, other information is received for
the application as well as the preliminary code for the
application. For example, resource files for the application can be
received that are used by the application when it is executed.
Resource files for applications can be one or more files that
include sound information, music information, graphics information,
video information, other media information, data base information,
text information, and the like. In some implementations, the
preliminary code can be packaged in and/or received in one or more
compressed files such as a ZIP file or a XAP file. Alternatively,
the preliminary code is not packaged in and/or received in one or
more compressed files. In some implementations, one or more files
with MDIL code for the application are received by the online
provider, but MDIL files received from the developer can be
discarded as untrusted files that were not generated by the online
provider. Alternatively, the online provider does not discard any
MDIL files received by the online provider. In some
implementations, the preliminary code can be received in one or
more assemblies. For example, preliminary code (such as code in
MSIL included in an assembly) can be compiled into code that is at
a binary level. An assembly that includes MSIL code can be an MSIL
assembly. In some implementations, an MSIL assembly can comprise
one or more files.
[0048] At 520, the preliminary code of the application is compiled
to produce MDIL code which is code that is in an intermediate
language that is machine dependent. As a general rule, decisions or
references within an IL file are resolved during the compilation
process, but decisions or references to a library, external source,
external type, etc. are left unresolved. The MDIL file is thus a
mix of (a) assembly instructions, native code or other device
dependent instructions and (b) pseudocode instructions or other
device independent instructions that are to be resolved later.
Thus, the MDIL code compiled from the preliminary code can be in an
intermediate language that is a lower level language than the
language of the preliminary code. For example, the preliminary code
is in an intermediate language that is at a higher level (further
away from machine code), and the MDIL code is at a lower level that
is closer to machine code. Even so, the MDIL code is typically not
directly executable without being bound, because the MDIL code
includes symbolic references that are not native code. Instead, the
MDIL code can be converted to executable machine code by a binder.
In some implementations, the preliminary code for the application
is not directly executable but can be compiled into executable code
when it is compiled by a just-in-time compiler. For example, code
for the application in MSIL can be just-in-time compiled to run the
application from the MSIL code. In some implementations, code for
an application in MSIL can be provided to a compiler to generate
MDIL code for the application. Typically, the MSIL code does not
include native instructions, nor does it include the pseudo
instructions included in the MDIL code that are to be resolved
and/or bound by a binder to generate native code for the
application.
[0049] The MDIL code can be included in one or more MDIL files. In
some implementations, an MDIL file can have a name and/or file
extension such that ".mdil" is included in the name and/or file
extension of the MDIL file. In other implementations, an MDIL file
can have another naming convention, such that ".mdil" is not
included in the name and/or file extension of the MDIL file.
[0050] In some implementations, when the preliminary code is
compiled, in addition to pseudo instructions, the compiler produces
one or more assemblies for the MDIL code. For example, MDIL code
included in an assembly can be compiled into code that is at a
binary level. An assembly that includes MDIL code can be an MDIL
assembly. In some implementations, an MDIL assembly can comprise
one or more files.
[0051] Compiling the preliminary code into MDIL code for the
application before the application code is received at a target
computing device (on which the application is to be executed) can
provide various advantages. For example, compile time can be
removed from the time it takes to install the application on the
target computing device. Removing the compilation from the
installation of the application on the target device can also allow
for compile-time optimizations of the code to be done in the cloud,
without that time being added to the time it takes to install the
application on a target device. In particular, this can help avoid
time-consuming re-compilation on the target computing device for
multiple applications that depend on a library whenever the library
is changed and/or when a runtime engine is changed.
[0052] In some implementations the compilation of the preliminary
code can produce one or more native code files for the application
that include native code for the application and do not include
MDIL code.
[0053] In some implementations, for each MSIL assembly file
received for the application a corresponding MDIL file is generated
by a compiler. The preliminary code can be compiled to generate
MDIL code that is dependent on an instruction set for a first
processor (for a first type of target computing device), and
different MDIL code can be generated that is dependent on an
instruction set for a second processor (for a second type of target
computing device). For example, compiling preliminary code for an
application can produce MDIL code that can be bound to run on a
device that has a first processor, and produce different MDIL code
for the application that can be bound to run on another device with
a different second processor. For example, the first processor can
be an ARM processor and the second processor can be an x86
processor.
[0054] At 530, the MDIL code of the application is signed as
trusted. For example, MDIL code files generated from the
preliminary code can be signed with a publisher key to indicate
that the signed files include trusted code. In some
implementations, native code generated by compiling preliminary
code can be signed as trusted. For example, native code files that
are generated by a compiler can be signed with a publisher key to
indicate that the signed files include trusted code.
[0055] At 540, an installation package is generated that includes
the MDIL code. For example, the MDIL code can be packaged into a
container such as one or more files that can be downloaded for
installing the application. In one implementation, the MDIL code in
one or more MDIL code files are packaged into one or more
compressed files such as a ZIP file or a XAP file. A compressed
installation package can lower the amount of data to be downloaded
for the application from the online provider. Alternatively, the
installation package is not in a compressed form. Different types
of MDIL code (adapted for different types of processors) can be
included in different installation packages for different types of
computing devices. The installation packages available for
different types of computing devices can also include a version
with non-MDIL code (e.g., MSIL code in a XAP file) for purposes of
backward compatibility.
[0056] In some implementations, the installation package can
include other information for the application such as resource
files for the application. For example, resource files for the
application can be received that can be used by the application
when it is executed. Resource files for applications can be one or
more files that include sound information, music information,
graphics information, video information, other media information,
data base information, text information, and the like. The
installation package can also include a listing of files that are
included in the installation package. The listing of files can
include information about the files included in the installation
package. For example, the installation package can include a file
that includes information organized using Extensible Markup
Language (XML). The XML file can include a list of the files that
are included in the installation package. For each of the files
listed, the XML file can include information associated with the
listed file. For example, the XML file can list each of the MDIL
code files included in the installation package and indicate that
each of the MDIL code files are able to be bound. The XML file can
also indicate the one or more libraries that are to be bound to the
code of respective listed MDIL code files.
[0057] In some implementations, the generated installation package
itself is signed as trusted. For example, the installation package
can be signed with a publisher key to indicate that it includes
code and/or other information that is trusted. In some
implementations, the installation package can be encrypted.
[0058] At 550, the installation package is provided for
downloading. For example, the online provider and/or partner of the
online provider can store the installation package for download.
The online provider can be an online marketplace from which one or
more applications can be downloaded for installation onto one or
more computing devices. The application can be included in a
catalogue of applications that are available for downloading from
the online marketplace. For example, the application can be
downloaded by a computing device using the internet and/or the
cloud. The application can be downloaded such that the installation
package for the application is downloaded. In some implementations,
the application can be downloaded to a computing device after the
application has been purchased and authorized to be downloaded to
the computing device. In some implementations, the application can
be downloaded without being purchased. For example, the application
can be offered and downloaded for free.
Exemplary System for Generating Updated Native Images for Installed
Applications
[0059] FIG. 6 is a diagram of a computing device 600 that can
generate one or more updated native images 605 for one or more
installed applications. In FIG. 6, the computing device includes
one or more generated native images 610 for the one or more
installed applications on the computing device. The computing
device 600 includes updated libraries 620, which include one or
more libraries that were updated after being bound to respective
MDIL code of applications to generate the one or more native images
610. Because at least one of the libraries that were bound to the
one or more native images 610 were updated, the computing device
600 updates the applications installed on it by generating the one
or more updated native images 605 for the installed applications.
The computing device also includes an updated runtime engine
670.
[0060] In generating the one or more updated native images 605 for
the installed applications, a binder 625 generates an updated
native image for each of one or more installed applications. As
shown in FIG. 6, for each installed application that has a native
image that was bound to at least one library that has been changed
and/or updated, the package manager 630 provides the binder 625 the
MDIL files of the respective application for rebinding to generate
an updated native image for the application being updated, such as
the updated native image 635. The updated native images can be
generated by the binder 625 such that the native images are
executable using the updated runtime engine 670.
[0061] To generate the updated native image 635, for each MDIL file
for the application being updated, binder 625 is provided the
respective MDIL file of the application such as MDIL file 640 and
one or more libraries such as the one or more libraries 645 that
are to be bound to the MDIL file. The one or more libraries
provided for binding to the code of the MDIL file can include at
least on library that has been updated and is included in the set
of updated libraries 620. In some implementations, one or more
libraries bound to the code of an MDIL file of an application being
updated have not been updated.
[0062] When generated, the updated native image for the
application, such as the updated native image 635, is stored as at
least one of the one or more updated native images 605 for the
installed applications on the computing device. The updated native
image can also be signed as trusted code, as shown at 650, before
the updated native image is used to execute the application. At
655, the computing device loads a generated updated native image
for an application to execute the application instead of the
previously generated native image for the application.
[0063] In addition to handling updates to libraries on the device,
the device can update an application when the application has
changed (e.g., MDIL code of the application has changed). In this
case, the device updates the application by generating an updated
native image for the application, including binding a new portion
of the MDIL code with the one or more libraries (unchanged) on the
device. The updated native image for the application can be
generated by the binder such that the native images are runnable
using the updated runtime engine.
[0064] As shown at 660, the previously generated native image can
be stored temporarily during the generation of the updated native
image and/or update of the computing device 600 until the update of
the application and/or computing device 600 is verified as
successful. If the update to the computing device and/or to the
application fails, the previously generated native image can be
restored from temporary storage and again used as the native image
that is loaded by the computing device to execute the
application.
Exemplary Method for Updating an Application through Native Code
Generation using Code in a MDIL
[0065] FIG. 7 is an exemplary method 700 for updating an
application by generating a native image for the application from
code in a MDIL. In various implementations, the illustrated method
blocks of FIG. 7 may be merged, divided into sub-blocks, or
omitted. In FIG. 7, a set of one or more libraries are updated on a
computing device, as shown at 710. For example, a portion or all of
the one or more libraries on the computing device are changed,
modified, or otherwise updated. In some implementations, the set of
one or more libraries are updated and a runtime engine of the
device is updated as part of a computing device update. In some
implementations, for one or more applications on the computing
device, at least one of the libraries of the one or more libraries
that were bound to MDIL code for the respective application (to
generate a native image for the respective application during
installation) has been changed, modified, or otherwise updated. In
some implementations, a library is updated and/or changed such that
the code of the native image for an application that is bound to
the library no longer corresponds properly to at least one offset
for the library. For example, an offset for at least one field of
an object has changed in the library, or the like. A set of the
libraries on the computing device can be updated as part of an
operating system update. Or, libraries on the computing device can
be updated as part of an update to a framework and/or an execution
engine update. For example, the computing device can use a
framework to execute managed application such as the .NET
framework, and the libraries that are part of the framework are
changes and/or updated and/or the runtime engine that is part of
the framework is changed and/or updated. In the .NET framework, the
base class libraries can be changed or updated to a different
and/or newer version of the framework libraries. In some cases, not
all the libraries on the computing device are updated and/or
changed. In other cases, all the libraries on the computing device
are updated and/or changed.
[0066] At 720, the computing device generates an updated native
image for an application. For example, an application that was
installed on the computing device by generating a native image from
MDIL code for the application can be updated such that a new native
image (e.g., an updated native image) is generated for the
application by binding the MDIL code for the application to one or
more libraries after at least one of the one or more libraries has
been updated on the computing device. The generating of the updated
native image can be similar to the generation of the native image
when the application was originally installed. For example, the
updated native image can be generated for the application using at
least one of the updated libraries of the computing device as
described above for the installation process. Thus, the generating
of an updated native image occurs after a first native image for
the application has already been generated for the application and
one or more of the libraries bound during the generation of the
first native image have been updated and/or changed on the
computing device. In some implementations, when the runtime engine
has been updated along with libraries of the computing device, the
binding of the MDIL code of the application being updated can be
done such that the generated native image is executable using the
updated runtime engine and the updated libraries as available on
the computing device.
[0067] Or, an updated native image can be generated when MDIL code
for the application is updated but libraries and/or runtime engines
have not changed. For example, the computing device receives new
MDIL code for the application as part of an application update. The
received new MDIL code for the application can be installed as
described herein such as using the method 200 above. For example,
the computing device updates the application by generating an
updated native image for the application, including binding a
portion of the new MDIL code with the one or more libraries
(unchanged) on the computing device. The native code generated for
the application by a binder can be generated such that it is
runnable using the runtime engine available on the device for
running the application.
[0068] In some implementations, for the application being updated,
the MDIL code for the application stored on the computing device
for the application can be bound to one or more libraries of the
device. For example, a binder can bind the MDIL code to one or more
libraries available on the computing device to generate an
executable native image that is updated for the application. The
binding resolves the MDIL code and generates native code for the
application that is included in the updated native image for the
application. In some implementations, in generating the updated
native image, for each MDIL file in the set of MDIL files for the
application, the respective MDIL file and the one or more libraries
that are to be bound to the MDIL code of the file are provided to
the binder. The binder binds the respective MDIL files to the
libraries provided to the binder to generate the updated native
image for the application. The updated native image can include
native code, such as machine code that is executable by the
processor of the computing device, and the updated native image
typically does not include unbound pseudo instructions as in the
MDIL code. In some implementations, the generated updated native
images can be signed as trusted code.
[0069] In some implementations, the updated native image replaces
the previously generated native image for the application as the
native image that is loaded for executing the application. The
updated native image is loaded to execute the application because
the updated native image includes native code that is executable
using the at least one of the updated libraries of the computing
device. The previously generated native image may be unstable
and/or unreliable, such that it does not function properly or as
expected, because it can improperly reference an earlier version of
one of the libraries available on the computing device.
[0070] In some implementations, when an updated native image is
being generated, the previously generated native image is stored
and/or backed up temporarily until the application and/or update to
the computing device is verified as successful. For example, an
update to the computing device that updates libraries of the
computing device can trigger the regeneration and/or updating of
native images for applications. If the update to the computing
device or the update of a native image for an application fails,
the failed update can be rolled back and the previously generated
native image of the application that is stored can be used as the
native image of the application when executed. In some
implementations, application data is also preserved. For example, a
user of the application can generate user data and/or application
data before the application is updated, and, after the application
is updated, the user data and/or application data can be preserved
such that the generation of the updated native image does not
change the user data and/or application data from the previous
version of the application.
[0071] At 730, the computing device generates an updated native
image for one or more other applications installed on the device.
For example, for each additional application installed on the
computing device that has a native image that was generated by
binding MDIL code to one or more of the libraries that were
updated, an updated native image for the respective application is
generated by binding the MDIL code to the one or more libraries as
updated. The dotted lines, as shown at 730, indicate that the block
730 can be omitted from the method or included in the method in
various implementations of the method 700. In some implementations,
after one or more libraries of a device are updated (such as in a
framework update), the applications of the device can be
automatically updated, and updated native images for the
applications can be generated, so that the applications execute
properly using the updated libraries. If an installed application
does not use shared libraries that have been updated and/or
changed, the application need not be updated, and an updated native
image need not be generated for the application, as the previously
generated native image for the application can function properly
with the libraries as available on the device. In some
implementations, when a runtime engine has been updated along with
the libraries of the computing device, the updated native images
for the applications can be generated such that the application is
executable on the computing device using the updated runtime engine
and the updated libraries as available on the computing device.
[0072] At 740, the updated native image is stored for use when
loading the application to execute the application at the computing
device. For example, the updated native image is loaded instead of
a native image of the application generated previous to the
generation of the updated native image. The updated native image is
loaded to execute the application because the updated native image
can properly reference the libraries it uses. By generating updated
native images by rebinding already downloaded MDIL code for an
application, a computing device that uses native images to run
applications can be updated without having to download an updated
version of the application, without re-installing the application
from newly downloaded information for the application, and without
re-compiling the application.
Exemplary Mobile Device
[0073] FIG. 8 is a system diagram depicting an exemplary mobile
device 800 including a variety of optional hardware and software
components, shown generally at 802. In general, a component 802 in
the mobile device can communicate with another component, although
not all connections are shown, for ease of illustration. The mobile
device can be any of a variety of computing devices (e.g., cell
phone, smartphone, tablet computer, handheld computer, Personal
Digital Assistant (PDA), etc.) and can allow wireless two-way
communications with one or more mobile communications networks 804,
such as a cellular or satellite network.
[0074] The illustrated mobile device 800 can include a controller
or processor 810 (e.g., signal processor, microprocessor, ASIC, or
other control and processing logic circuitry) for performing such
tasks as signal coding, data processing, input/output processing,
power control, and/or other functions. An operating system 812 can
control the allocation and usage of the components 802 and support
for one or more application programs 814 and/or one or more
software programs 815 such as one that can implement one or more of
the technologies described herein for generating native code from
IL code on a device for applications. The application programs can
include common mobile computing applications and software (e.g.,
email applications, calendars, contact managers, web browsers,
messaging applications, a runtime engine), or any other computing
applications. Functionality 813 for accessing an application store,
an online marketplace, or online provider can also be used for
acquiring and updating code and/or other information for
application programs 814.
[0075] The illustrated mobile device 800 can include memory 820.
Memory 820 can include non-removable memory 822 and/or removable
memory 824. The non-removable memory 822 can include RAM, ROM,
flash memory, a hard disk, or other well-known memory storage
technologies. The removable memory 824 can include flash memory or
a Subscriber Identity Module (SIM) card, which is well known in GSM
communication systems, or other well-known memory storage
technologies, such as "smart cards." The memory 820 can be used for
storing data and/or code for running the operating system 812 and
the applications 814 and 815. Example data can include web pages,
text, images, sound files, video data, or other data sets to be
sent to and/or received from one or more network servers or other
devices via one or more wired or wireless networks. The memory 820
can be used to store a subscriber identifier, such as an
International Mobile Subscriber Identity (IMSI), and an equipment
identifier, such as an International Mobile Equipment Identifier
(IMEI). Such identifiers can be transmitted to a network server to
identify users and equipment.
[0076] The mobile device 800 can support one or more input devices
830, such as a touchscreen 832, microphone 834, camera 836,
physical keyboard 838 and/or trackball 840 and one or more output
devices 850, such as a speaker 852 and a display 854. Other
possible output devices (not shown) can include piezoelectric or
other haptic output devices. Some devices can serve more than one
input/output function. For example, touchscreen 832 and display 854
can be combined in a single input/output device. The input devices
830 can include a Natural User Interface (NUI). An NUI is any
interface technology that enables a user to interact with a device
in a "natural" manner, free from artificial constraints imposed by
input devices such as mice, keyboards, remote controls, and the
like. Examples of NUI methods include those relying on speech
recognition, touch and stylus recognition, gesture recognition both
on screen and adjacent to the screen, air gestures, head and eye
tracking, voice and speech, vision, touch, gestures, and machine
intelligence. Other examples of a NUI include motion gesture
detection using accelerometers/gyroscopes, facial recognition, 3D
displays, head, eye, and gaze tracking, immersive augmented reality
and virtual reality systems, all of which provide a more natural
interface, as well as technologies for sensing brain activity using
electric field sensing electrodes (EEG and related methods). Thus,
in one specific example, the operating system 812 or applications
814 can comprise speech-recognition software as part of a voice
user interface that allows a user to operate the device 800 via
voice commands. Further, the device 800 can comprise input devices
and software that allows for user interaction via a user's spatial
gestures, such as detecting and interpreting gestures to provide
input to a gaming application or other application.
[0077] A wireless modem 860 can be coupled to an antenna (not
shown) and can support two-way communications between the processor
810 and external devices, as is well understood in the art. The
modem 860 is shown generically and can include a cellular modem for
communicating with the mobile communication network 804 and/or
other radio-based modems (e.g., Bluetooth 864 or Wi-Fi 862). The
wireless modem 860 is typically configured for communication with
one or more cellular networks, such as a GSM network for data and
voice communications within a single cellular network, between
cellular networks, or between the mobile device and a public
switched telephone network (PSTN).
[0078] The mobile device can further include at least one
input/output port 880, a power supply 882, a satellite navigation
system receiver 884, such as a Global Positioning System (GPS)
receiver, an accelerometer 886, and/or a physical connector 890,
which can be a USB port, IEEE 1394 (FireWire) port, and/or RS-232
port. The illustrated components 802 are not required or
all-inclusive, as any components can deleted and other components
can be added.
Exemplary Implementation Environment
[0079] FIG. 9 illustrates a generalized example of a suitable
implementation environment 900 in which described embodiments,
techniques, and technologies may be implemented.
[0080] In example environment 900, various types of services (e.g.,
computing services) are provided by a cloud 910. For example, the
cloud 910 can comprise a collection of computing devices, which may
be located centrally or distributed, that provide cloud-based
services to various types of users and devices connected via a
network such as the Internet. The implementation environment 900
can be used in different ways to accomplish computing tasks. For
example, some tasks (e.g., processing user input and presenting a
user interface) can be performed on local computing devices (e.g.,
connected devices 930, 940, 950) while other tasks (e.g., storage
of data to be used in subsequent processing) can be performed in
the cloud 910.
[0081] In example environment 900, the cloud 910 provides services
for connected devices 930, 940, 950 with a variety of screen
capabilities. Connected device 930 represents a device with a
computer screen 935 (e.g., a mid-size screen). For example,
connected device 930 could be a personal computer such as desktop
computer, laptop, notebook, netbook, or the like. Connected device
940 represents a device with a mobile device screen 945 (e.g., a
small size screen). For example, connected device 940 could be a
mobile phone, smart phone, personal digital assistant, tablet
computer, or the like. Connected device 950 represents a device
with a large screen 955. For example, connected device 950 could be
a television screen (e.g., a smart television) or another device
connected to a television (e.g., a set-top box or gaming console)
or the like. One or more of the connected devices 930, 940, and 950
can include touchscreen capabilities. Touchscreens can accept input
in different ways. For example, capacitive touchscreens detect
touch input when an object (e.g., a fingertip or stylus) distorts
or interrupts an electrical current running across the surface. As
another example, touchscreens can use optical sensors to detect
touch input when beams from the optical sensors are interrupted.
Physical contact with the surface of the screen is not necessary
for input to be detected by some touchscreens. Devices without
screen capabilities also can be used in example environment 900.
For example, the cloud 910 can provide services for one or more
computers (e.g., server computers) without displays.
[0082] Services can be provided by the cloud 910 through service
providers 920, or through other providers of online services (not
depicted). For example, cloud services can be customized to the
screen size, display capability, and/or touchscreen capability of a
particular connected device (e.g., connected devices 930, 940,
950).
[0083] In example environment 900, the cloud 910 provides the
technologies and solutions described herein to the various
connected devices 930, 940, 950 using, at least in part, the
service providers 920 and the one or more online providers 925. For
example, the service providers 920 can provide a centralized
solution for various cloud-based services. The service providers
920 can manage service subscriptions for users and/or devices
(e.g., for the connected devices 930, 940, 950 and/or their
respective users). The cloud 910 can provide resources for
downloading, sending, or receiving one or more one installation
packages for one or more applications as discussed herein. For
example, intermediate language code for an application can be
compiled in the cloud 910 by at least one of the online providers
925. As shown at 965, a native image is generated for an
application by connected device 930 from IL code downloaded from
the cloud 910.
Exemplary Computing Environment
[0084] FIG. 10 depicts a generalized example of a suitable
computing environment 1000 in which the described innovations may
be implemented. The computing environment 1000 is not intended to
suggest any limitation as to scope of use or functionality, as the
innovations may be implemented in diverse general-purpose or
special-purpose computing systems. For example, the computing
environment 1000 can be any of a variety of computing devices
(e.g., desktop computer, laptop computer, server computer, tablet
computer, media player, gaming system, mobile device, etc.)
[0085] With reference to FIG. 10, the computing environment 1000
includes one or more processing units 1010, 1015 and memory 1020,
1025. In FIG. 10, this basic configuration 1030 is included within
a dashed line. The processing units 1010, 1015 execute
computer-executable instructions. A processing unit can be a
general-purpose central processing unit (CPU), processor in an
application-specific integrated circuit (ASIC) or any other type of
processor. In a multi-processing system, multiple processing units
execute computer-executable instructions to increase processing
power. For example, FIG. 10 shows a central processing unit 1010 as
well as a graphics processing unit or co-processing unit 1015. The
tangible memory 1020, 1025 may be volatile memory (e.g., registers,
cache, RAM), nonvolatile memory (e.g., ROM, EEPROM, flash memory,
etc.), or some combination of the two, accessible by the processing
unit(s). The memory 1020, 1025 stores software 1080 implementing
one or more innovations described herein, in the form of
computer-executable instructions suitable for execution by the
processing unit(s).
[0086] A computing system may have additional features. For
example, the computing environment 1000 includes storage 1040, one
or more input devices 1050, one or more output devices 1060, and
one or more communication connections 1070. An interconnection
mechanism (not shown) such as a bus, controller, or network
interconnects the components of the computing environment 1000.
Typically, operating system software (not shown) provides an
operating environment for other software executing in the computing
environment 1000, and coordinates activities of the components of
the computing environment 1000.
[0087] The tangible storage 1040 may be removable or non-removable,
and includes magnetic disks, magnetic tapes or cassettes, CD-ROMs,
DVDs, or any other medium which can be used to store information in
a non-transitory way and which can be accessed within the computing
environment 1000. The storage 1040 stores instructions for the
software 1080 implementing one or more innovations described herein
such as generating native code from IL code for one or more
applications.
[0088] The input device(s) 1050 may be a touch input device such as
a keyboard, mouse, pen, or trackball, a voice input device, a
scanning device, or another device that provides input to the
computing environment 1000. For video encoding, the input device(s)
1050 may be a camera, video card, TV tuner card, or similar device
that accepts video input in analog or digital form, or a CD-ROM or
CD-RW that reads video samples into the computing environment 1000.
The output device(s) 1060 may be a display, printer, speaker,
CD-writer, or another device that provides output from the
computing environment 1000.
[0089] The communication connection(s) 1070 enable communication
over a communication medium to another computing entity. The
communication medium conveys information such as
computer-executable instructions, audio or video input or output,
or other data in a modulated data signal. A modulated data signal
is a signal that has one or more of its characteristics set or
changed in such a manner as to encode information in the signal. By
way of example, and not limitation, communication media can use an
electrical, optical, RF, or other carrier.
[0090] Although the operations of some of the disclosed methods are
described in a particular, sequential order for convenient
presentation, it should be understood that this manner of
description encompasses rearrangement, unless a particular ordering
is required by specific language set forth below. For example,
operations described sequentially may in some cases be rearranged
or performed concurrently. Moreover, for the sake of simplicity,
the attached figures may not show the various ways in which the
disclosed methods can be used in conjunction with other
methods.
[0091] Any of the disclosed methods can be implemented as
computer-executable instructions stored on one or more
computer-readable storage media (e.g., non-transitory
computer-readable media, such as one or more optical media discs,
volatile memory components (such as DRAM or SRAM), or nonvolatile
memory components (such as flash memory or hard drives)) and
executed on a computer (e.g., any commercially available computer,
including smart phones or other mobile devices that include
computing hardware). As should be readily understood, the term
computer-readable storage media does not include communication
connections, such as modulated data signals. Any of the
computer-executable instructions for implementing the disclosed
techniques as well as any data created and used during
implementation of the disclosed embodiments can be stored on one or
more computer-readable media (e.g., non-transitory
computer-readable media, which excludes propagated signals). The
computer-executable instructions can be part of, for example, a
dedicated software application or a software application that is
accessed or downloaded via a web browser or other software
application (such as a remote computing application). Such software
can be executed, for example, on a single local computer (e.g., any
suitable commercially available computer) or in a network
environment (e.g., via the Internet, a wide-area network, a
local-area network, a client-server network (such as a cloud
computing network), or other such network) using one or more
network computers.
[0092] For clarity, only certain selected aspects of the
software-based implementations are described. Other details that
are well known in the art are omitted. For example, it should be
understood that the disclosed technology is not limited to any
specific computer language or program. For instance, the disclosed
technology can be implemented by software written in C++, C#, J++,
Java, Perl, JavaScript, Adobe Flash, or any other suitable
programming language. Likewise, the disclosed technology is not
limited to any particular computer or type of hardware. Certain
details of suitable computers and hardware are well known and need
not be set forth in detail in this disclosure.
[0093] It should also be well understood that any functionally
described herein can be performed, at least in part, by one or more
hardware logic components, instead of software. For example, and
without limitation, illustrative types of hardware logic components
that can be used include Field-programmable Gate Arrays (FPGAs),
Program-specific Integrated Circuits (ASICs), Program-specific
Standard Products (ASSPs), System-on-a-chip systems (SOCs), Complex
Programmable Logic Devices (CPLDs), etc.
[0094] Furthermore, any of the software-based embodiments
(comprising, for example, computer-executable instructions for
causing a computer to perform any of the disclosed methods) can be
uploaded, downloaded, or remotely accessed through a suitable
communication means. Such suitable communication means include, for
example, the Internet, the World Wide Web, an intranet, software
applications, cable (including fiber optic cable), magnetic
communications, electromagnetic communications (including RF,
microwave, and infrared communications), electronic communications,
or other such communication means.
[0095] The disclosed methods, apparatus, and systems should not be
construed as limiting in any way. Instead, the present disclosure
is directed toward all novel and nonobvious features and aspects of
the various disclosed embodiments, alone and in various
combinations and subcombinations with one another. The disclosed
methods, apparatus, and systems are not limited to any specific
aspect or feature or combination thereof, nor do the disclosed
embodiments require that any one or more specific advantages be
present or problems be solved. In view of the many possible
embodiments to which the principles of the disclosed invention may
be applied, it should be recognized that the illustrated
embodiments are only preferred examples of the invention and should
not be taken as limiting the scope of the invention. Rather, the
scope of the invention is defined by the following claims. We
therefore claim as our invention all that comes within the scope of
these claims and their equivalents.
* * * * *